Process and article for use in the manufacture of combined picture and sound films



May 25, 1943. v w. MlcHAELls 2,320,005

PROCESS AND ARTICLE FOR USE IN THE MANUFACTURE OF COMBINED YIGTURE AND SOUND FILMS Filed .my 12, 1959 l 3 form (ye lmqges.

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' Patented May 25, 1943 'PROCESS AND ARTICLE FOR USE IN THE UFACTUBE OF COMBINED PICTURE AND SOUND FILMS Walter Michaelis,

Brussels-Forest, Belgium, as-

signor, by mesne assignments, to Chromogen, Incorporated, a corporation of Nevada Application July 12, 1939, serial No. 284,101 In Germany July 13, 1938 9 Claims.

The present invention relates to a process for the manufacture of a combined picture and sound 'ilm in which the picture part is a multicolor image.and in which the sound part consists of a metallic silver sound track on a colored or uncolored background. According to the present invention those combined picture and sound films already known as such can be manufactured in a special manner adapted to particular requirements in practice.

In the manufacture of advertising films it is customary to manufacture such advertising films whose picture part shows identically the same plot in the form of a colored cinematographic picture strip and which differl only in the accompanying text prepared especially for the 4businessmen of a special branch who live at difierent places. In the interest of economical production, it is very advantageous if such lms can be manufactured in a large series and placed in reserve during times of reduction in the normal amount of work, these lms having the desired text subsequently added thereto. Also in those cases in which some copies must be provided with a subsequently synchronised form in a foreign language it is desirable to manufacture the picture strips necessary for the copies in foreign language directly following theproduction of the large series of the actual film, even if the synchronising is not nished and hence the completion of the copies is still impossible. Finally, it lies in the interest of simplified processing to posscss some finished picture strips in reserve which, in case of a sudden need. can be provided with the one or the other language text. The invention fulfills these and similar requirements. It is therefore in accordance with my invention that in the picture part of the lm the part images necessary for the production of the multicolor image are printed and thereafter transformed into dye images and that on the other hand, the sound strip, i. e., that part of the film into which the sound track is to be printed, is completely blackened by means of a uniform exposure and development so that after the completion of the picture part the film consists of a multicolor image and a uniformly black strip of metallic silver. in the entire field of the sound track which is to lbe used for a later recording. For recording purposes the uniformly black strip of metallic silver is transformed into a lightsensitive salt and the light-sensitive strip thus obtained is used for printing the sound track, thereby (after exposure andflxing) yielding the black sound track. This invention described `in many different ways vof the dye image.

layer as the middle layer above in its fundamental form can be carried out these procedures varying according to the method used for the production Several of these procedures are described in the following.

In the accompanying drawing, Fig. 1 is a flow diagram illustrating successive sectional views of a three layer lm in which the successive views represent successive stages in a processing treatment using a dye destroying process. Fig` 2 is a similar flow diagram illustrating successive stages in a processing treatment using a color development process.

Example 1.--Production of the multicolor image by local dye destruction. A three layer film such as shown in Fig. 1 with predyed layers i, 2 and 3 differently sensitized according to Patent No. 2,183,393 of December 12, 1939, is used. It comprises a support 4 coated on both sides and carrying Iblue-sensitive layers i and 3 as the top and rear layers and a yellow-dyed red-sensitive 2. The partv color images are printed from positive master images into the dierent layers, i. e., the red extract with blue light into the bluegreen layer I, the green extra-ct with blue light into the magenta layer 3 and the blue extract with red light into the yellow layer 2. Furthermore, thev sound strip part 5 of the film is uniformly exposed to red or blue light, the choice of light depending on whether the sound track is later to be produced on a co1- ored or a colorless background. The entire film is thereupon treated with a dye-destroying bath, such, for example, as 5% hydrogen bromide which effects the local dye destruction at thc exposed places and, which does not dissolve or at most only partly dissolves the silver and which forms at the places of the silver a silver salt insoluble in the treatment bath. The silver precipitate Within the area of the sound track participates in this reaction and effects decoloration of the strip designated forv the sound track. The lmas thus exposed and developed and later treated with such a dye destroying bath is illustrated in step I of the flow diagram shown in Fig. l. If a complete decoloration of the strip such as shown in step I is to be effected, all three layers are exposed; orof, for example, only the blue-green color is to be destroyed so4 that the yellow and the magenta dye remain and finally a black and red sound track is obtained, only Athe -blugreen side of the film is exposed. After the dye destroying treatment the metallic silver or'the silver salt, if any is formed, is dissolved out in the picture part of the film, but

range of the sound track and if this layer is ences of any sort.

2 2,320,005, not in the `sound track part of the iilm. The

silver salt formed in this part is, on the consame manner by uniformly exposing the corretrary, re-converted into metallic silver before the sponding image field parts. In this case the collrn is fixed. As the process is illustrated in ored background can also be provided with a Fig. 1 all of the developed silver is converted to pattern if, for example, in two of the three colsilver salt in -both the picture part and the ored layers dye images are produced during the sound track part of the film (see particularly image formation and only the third layer is step 1I). The silver in the sound track part of uniformly blackened and reserved for the subsethe film is then re-converted to metallic silver'as quent printing in of the titles.

'shown in step III. After the fixing as shown l0 After the silver deposit of the sound trackis in step IV the film shows the finished muticolor re-converted into a silver halide it can either at image in the picture part and a uniform blackthe same time with the re-conversion or, subseT enin'g of the sound area. In this state the film quently, be treated with the solution of a colorcan be examined in the usual manner and can or chemical sensitiser, for example, with a solube stored in any way without any special pretion of 0.1 gram -benzothiopseudocyanine ethyl cautions being necessary before the sound track iodide in 1 liter of water. is printed onto it. Before the printing of the What is claimed is: Y sound track the film is led through a bath 1. The process of producing a combined multiwhich converts the metallic silver into light-sencolor cinematographic and sound nlm from a sitive salt as shown in step V and thereafter it 20 multicolor picture film which has a series of mulis exposed through the sound master image, deticolor pictures in the picture area suitable for veloped and fixed to form the final print as shown projection and storage, and a silver deposit in in step VI.

The process described in the above example being of uniform density and area, which comeXplains the method for a case in which the exprises converting said metallic silver within the Dosure of the iilm results in decoloration at the sound area into a light-sensitive silver salt WitheXDOSed places. The following serves as an eX- out affecting said multicolor pictures, printing ample for a DrOCeSS in Which ,the eXDOSuIe has the sound record into the sound area, developing the effect that the exposed places appear colored the sound record and fixing the illm. in the finished nlm. 2. A multicolor cinematographic lm including Example 2,-The sound film as shown in Fig. a picture area and a sound area, said picture area .2 iS formed 0n a three-layer-lm Whose layers containing therein a series of multicolor pictures 6. 1 and 8 are coated on a support 9 and Contain suitable for projection and storage, said nlm concornponents for color development in the known taining a silver deposit in the sound area only, manner. If in this ease all three layers are said silver deposit being of uniform density and equally blackened Within the area l0 of the sound area, track and the sound track area is treated the 3. The process of producing a cinematographic same as iS the picture Part, dyes are then formed film having a series of cinematographic picture in all three layers during the color development. records and a sound record inv different areas In this case the components must be ChOSeIl i11 40 thereof, which comprises printing the pictures Such e Way that the dyes formed are transparent into a silver halide emulsion within the picture for dark red or infrared light. If e black Sound area of said film, uniformly illuminating a silver track on'a red background is to be formed, then halide emulsion in the sound area of said film, in this ease only those two layers are exposed developing both areas of said nlm to form picwithin the range of the sound track which deture records in the picture area and a silver develop in magenta and in yellOW C0101- MOreOVeI. posit uniformly covering the sound area, fixing the usual color development iS performed with said lm to provide a finished picture record the only difference that the metallic silver desuitable for projection and storage, and subseveloped at the Seme time eS the dye iS not requently reconverting the metallic silver within moved by means of the usual Farmers reducer, the sound area alone into a light sensitive silver but is transformed beforehand throughout the salt, printing the sound record into the sound entire film into silver chloride, as shown in step area, developing and fixing the nlm,

II, by treatment With a neutral Copper chloride 4. The process of producing a cinematographic Solution 0r (by treatment With Other Suitable lm having a series of multicolor picture records solutions) into another silver salt Which can be and a sound record in different areas thereof, fixed out. 'I'he Silver Salt in the Strip for the which comprises printing the color separation production of the soundtrack is re-converted, records of the multicolor pictures into a silver as shown in step III, into black silver by develhalide emulsion within the picture area of said opers, fogging agents, or reducers before the iilm film, uniformly illuminating a silver halide emulis fixed as shown in step IV. The film can be sion in the sound area of said film, developing stored until the sound track is to be printed both areas of said llm, converting the color septherein. The printing of the sound track is peraration records in the picture area of said lm formed as described in Example'l and as illusinto multicolor images, removing the developed trated in steps V and VI of Fig. 2.

silver from said picture area in such a way as If a layer of a multilayer nlm which does not to leave a uniform silver deposit in said sound lie at the surface is exposed uniformly in the area thereby providing a finished multicolor black onto a white or colored background in the image suitable for projection and storage, and thereby reserved for the subsequent sound resubsequently reconverting the metallic silver cording, the sound track does not lie at the surwithin the sound area into a light sensitive silver face and is protected against mechanical inusalt, Printing the sound record into the sound area, developing and fixing the film. If further recordings, as for example, subtitles 5. 'I'he process of producing a cinematographic or intermediate titles which are to be only sublm having a series of multi color picture records sequently printed in are to be united with the `and a sound record in diff erent areas thereof, picture part then these recordings can be printed which comprises printing .the color separation the sound area only of said film, said deposit records of the multicolor pictures into a silver halide emulsion within the picture area of said nlm, uniformly illuminating a silver halide emulsion in the sound area of said nlm, developing both areas of said nlm, converting the color separation records in the picture area of said nlm into multicolor images, converting the developed silver in both the picture area and the sound area into a soluble silver salt, reconverting said silver salt in the sound area alone to metallic silver, dissolving the silver salt from the picture .area of said nlm thereby providing a film suitable for projection and storage which has asilver deposit of uniform density in the sound area and a finished multicolor image in the picture area, and subsequently reconverting the metallic silver Within the sound area into a light sensitive silversalt, printing the sound record into the sound area, developing and nxing the nlm.

6. The process of producing a multilayer cinematographic film Vhaving a series of multicolor picture records and a sound record in different areas thereof, which comprises printing the color separation records of the multicolor pictures in separation records of the multicolor superposition into corresponding superposed and differently color-sensitized light sensitive silver halide emulsion layers on said multilayer nlm, uniformly illuminating the sound area of at least one of said differently color-sensitized layers, developing both areas of said nim, converting the color separation records in the'picture area of said nlm into multicolor images, removing the i developed silver from said picture area in such a way as to leave a uniform silver deposit in the sound area of said one of said differently colorsensitized layers thereby providing a finished multicolor image suitable for projection and storage, and subsequently reconverting the metallic silver within the sound area into a light sensitive silver salt, printing the sound record into the sound area, developing and fixing the nlm.

7. y'I'he process of producing a cinematographic nlm having a series of multicolor picture records and a sound record in different areas thereof, which comprises printing the color separation records of the multicolor pictures into a silver halide emulsion within the picture area of said nlm, uniformly illuminating a silver halide emulsion in the sound area of said nlm, developing both areas of said nlm, converting the color separation records in the picture area of said nlm into multicolor images, removing the developed silver from said picture area in such a way as to leave a uniform silver deposit in said sound area thereby providing a nnished multicolor image suitable for projection and storage, fixing, and

subsequently reconverting the metallic silver Within the sound area into a light sensitive silver salt, printing the sound record into the sound area, developing and nxing the nlm.

8. 'I'he process of producing a multilayer cinematographic iilm having a series of multicolor picture records and a sound record in different areas thereof, which comprises printing the color pictures in superposition into corresponding superposed and differently color-sensitized light sensitive silver halide emulsion layers on said multilayer nlm, uniformly illuminating the sound area of at least one of said differently color-sensitized layers, developing both areas of said nlm, converting the color separation records in the picture area of said nlm into multicolor images, removing the developed silver from said picture area in such a. lway as to leave a uniform silver deposit in the sound area of said one of said differently color-sensitized layers thereby providing a finished multicolor image suitable Yfor projection and storage, nxing, and subsequently reconverting the metallic silver within the sounc. area into a light sensitive silver salt, printing the sound record into the sound area, developing and nxing the film.Y

9. The process of producing a cinematographic nlm having a series of multicolor picture records and a sound record in different areas thereof, which comprises printing .the color separation records of the multicolor pictures into a silver halide emulsion within the picture area of said nlm, uniformly illuminating a silver halide emulsion in the sound area of said nlm, developing both areas of said film, converting the color separation records in the picture area of said nlm into multicolor images, removing the developed silver from said picture area in such a Way as to leave a uniform silver deposit in said sound area in the uniformly illuminated emulsion thereby providing a finished multicolor image suitable for projection and storage, and subsequently reconverting the metallic silver within the sound area into a light sensitive silver salt, printing the .sound record into the sound area, developing and nxing the nlm.

WALTER MICHAEL'IS. 

